The woman and the cat
دَخَلَتِ امْرَأَةٌ النَّارَ فِي هِرَّةٍ رَبَطَتْهَا، فَلَمْ تُطْعِمْهَا، وَلَمْ تَدَعْهَا تَأْكُلُ مِنْ خَشَاشِ الْأَرْضِ
Dakhalati-mra'atun-n-nara fi hirratin rabatatha, fa-lam tut'imha, wa lam tada'ha ta'kulu min khashashi-l-ard.
"A woman entered the Fire because of a cat she tied up. She did not feed it, and she did not let it eat from the creatures of the earth."
Narrated by Abdullah ibn Umar. Sahih al-Bukhari 3318, Sahih Muslim 2242
A short reflection
Cruelty to a small thing, named directly, set against Paradise. The opposite of the man and the dog. Both hadiths sit next to each other in the books.